Silicone particles, and cosmetic, coating, and resin formulated using same

ABSTRACT

Silicone particles having excellent dispersibility are provided. A cosmetic material having excellent feeling of use, and a highly functional paint and an electronic material are also provided. The silicone particles include a siloxane as a component. A content of a hydrogen atom bonded to a silicon atom per unit mass is 300 ppm or less. In addition, the silicon atom in the siloxane as a component for the silicone particles is crosslinked with another silicon atom via an alkylene group having a carbon number of 4 to 20.

TECHNICAL FIELD

The present invention relates to silicone particles having lowaggregation over time and high lipophilicity without blending a thirdcomponent such as inorganic fine particles and silsesquioxane particles.The present invention relates to a cosmetic material containing siliconeparticles having excellent feeling in use, and a cosmetic raw materialthereof, and a paint and a resin compounding agent.

BACKGROUND ART

Silicone particles are used as additives for cosmetic materials, paints,inks, thermosetting organic resins, thermoplastic organic resins and thelike. In particular, silicone particles are suitably used as stressrelieving agents for thermoplastic organic resins or as surfacelubricants for organic resin films.

Silicone particles are obtained by curing an addition reaction-curablesilicone composition or a condensation reaction-curable siliconecomposition. The particle size and the oil absorption properties varydepending on the method for producing thereof. In general, when granulesare produced by crushing a cured product, the miniaturization islimited. Therefore, a method for producing silicone particles having asmall particle size by curing reaction of a particulate matter of thecrosslinkable silicone composition is preferred.

However, even if the primary particles are fine, they tend to aggregateover time into the secondary particles. Further, the aggregatedparticles are not easily redispersed to form the primary particles. Thisis due to the phenomenon that once the primary particles are bondedtogether as aggregated particles, the bond is less likely to split(dissociate).

Disclosed was a method for adding and curing an organic compound havingan aliphatic unsaturated bond such as hexadiene or cyclohexanedimethanoldivinyl ether during the formation of silicone particles in order to beuseful as cosmetic raw materials. (JP Patent No. 4371480.) However, whenthis method is used, the organic compound is not sufficientlyincorporated into silicone particles, and if unreacted SiH is used as aresidue, then the particles may aggregate over time.

When silicone particles having strong aggregation properties are blendedin a solvent, the silicone particles having the primary particle sizethemselves are not dispersed, and the particles become secondaryaggregated particles or a larger agglomerate thereof. The problem isthat the dispersion is insufficient and a uniform mixture cannot beprepared from them. Therefore, there is a problem that the compositioncontaining silicone particles cannot fully exhibit the characteristicsof silicone particles. In general, it is known that particles having lowhardness, such as silicone rubber granules, tend to aggregate over time.

It is also known that such aggregation over time affects the oilabsorption properties of silicone particles. There is a problem of howto control this oil absorption properties for using as cosmeticproducts. Therefore, attempts have been made to control this oilabsorption properties by controlling the temperature after production.(JP Patent No. 5185111) However, there was a big problem in that acontrol period is required after production.

Previously, vinyl groups have been used as alkenyl groups in thepreparation of silicone particles. The use of a vinyl group is extremelyadvantageous to reduce cost and to estimate more easily the shape ofsilicone particles after the reaction. However, there has been afundamental problem in that even if the improvement is achieved withsilicone particles using the vinyl group, solutions have not been madewith respect to the various problems as described above.

CITATIONS LIST Patent Literature

Patent Literature 1: Japanese Patent No. 4371480

Patent Literature 2: Japanese Patent No. 5185111

Patent Literature 3: Japanese Unexamined Patent Application No.2014-122316

SUMMARY OF INVENTION Technical Problems

An object of the present invention is to provide silicone particleshaving excellent dispersibility, high lipophilicity and high storagestability, and a suitable method for producing thereof. Another objectof the present invention is to provide a cosmetic material havingexcellent feeling of use, a resin having high functionality, and rawmaterials thereof.

Solutions to Problems

In silicone particles according to one embodiment of the presentinvention, the content of the hydrogen connected to the silicon atom perunit mass is 300 ppm or less, and the silicon atom in the siloxane thatis a component for silicone particles is crosslinked with the othersilicon atom via an alkylene group having a carbon number of 4 to 20.

The cosmetic raw material and the resin compounding agent according toone embodiment of the present invention is composed of theabove-mentioned silicone particle. The cosmetic product, the paint andthe electronic material contains the above-mentioned silicone particle.

The crosslinkable composition for forming silicone particles accordingto one embodiment of the present invention includes components (A) and(C) below:

(A) an organopolysiloxane having two or more alkenyl groups having 4 ormore and 20 or less carbon atoms in one molecule; and(B) a silicon organic compound having two or more hydrogen atomsconnected to the silicon atom in one molecule, with the hydrogen atomsbeing not more than 40% based on the number of silicon atoms in onemolecule, and/or

a silicon organic compound having two or more hydrogen atoms connectedto the silicon atom in one molecule and having a trifunctional siloxaneunit or a tetrafunctional siloxane unit;

wherein the molar ratio of the content of the alkenyl group (Alk) in thecomponent (A) to the content of the hydrogen atom (H) connected to thesilicon atom in the component (B) is:

H/Alk=0.7 to 1.2.

The method for producing silicone particles according to one embodimentof the present invention includes emulsifying the composition asdescribed above and curing the composition in the presence of acatalyst.

Advantageous Effects of Invention

The silicone particles according to one embodiment of the presentinvention have low aggregation over time and high storage stability. Inaddition, silicone particles themselves have a pleasant tactilesensation, and have a characteristic that the feeling of use ofcosmetics and the function of paints, resins and electronic materialscan be improved. In addition, the composition according to oneembodiment of the present invention can provide silicone particles.Further, the method for producing silicone particles, which is oneembodiment of the present invention, is characterized in that suchsilicone particles can be produced efficiently.

DESCRIPTION OF EMBODIMENTS

Hereinafter, silicone particles of the present invention, a method forproducing thereof, and cosmetics, paints and resins using the same willbe described in detail.

In silicone particles according to one embodiment of the presentinvention, the content of the hydrogen connected to the silicon atom perunit mass is 300 ppm or less, and the silicon atom in the siloxane as acomponent for silicone particles is crosslinked with the other siliconatom via an alkylene group having a carbon number of 4 to 20.

The content of the hydrogen connected to the silicon atom in siliconeparticles according to one embodiment of the present invention ispreferably 300 ppm or less, more preferably 250 ppm or less, and furtherpreferably 200 ppm or less. Furthermore, the content is preferably 150ppm or less, preferably 100 ppm or less, preferably 50 ppm or less, andfurther preferably 20 ppm or less. In this embodiment, if the content ofthe hydrogen connected to the silicon atom is increased, the hydrogen iscrosslinked with other silicone particles to aggregate over time. Inaddition, in this embodiment, since there remains the hydrogen connectedto the silicon atom in the silicone particle, hydrogen gas is generatedduring storage. By reducing or eliminating the generation of hydrogengas, there is an advantage that silicone particles can be manufacturedmore safely.

As a method for measuring the hydrogen connected to the silicon atom inthe silicone particle, a typical method is one using a gaschromatography (headspace method). For example, the hydrogen can beidentified by adding an equivalent solution of potassium hydroxide inethanol at a concentration of 40% to the unit mass of the siliconeparticle, standing the mixture for 1 hour, collecting the generatedhydrogen gas until the reaction is completed, and quantitating by aheadspace gas chromatography.

Preferably, the alkylene group which is crosslinked between the siliconatom in the siloxane as the component for silicone particles of thepresent invention and the other silicon atom has a carbon number of 4 to20. The carbon number is more preferably 5 or more, 6 or more. On theother hand, the number is 16 or less, 12 or less, and 8 or less.

Silicone particles according to one embodiment of the present inventioncan be produced by reacting a composition including components (A) and(B) below:

(A) an organopolysiloxane having two or more alkenyl groups having 4 ormore and 20 or less carbon atoms in one molecule; and(B) a silicon organic compound having two or more hydrogen atomsconnected to the silicon atom in one molecule, with the hydrogen atomsbeing not more than 40% based on the number of silicon atoms in onemolecule, and/or

a silicon organic compound having two or more hydrogen atoms connectedto the silicon atom in one molecule and having a trifunctional siloxaneunit or a tetrafunctional siloxane unit, wherein

the molar ratio of the content of the alkenyl group (Alk) in thecomponent (A) to the content of the hydrogen atom (H) connected to thesilicon atom in the component (B) is:

H/Alk=0.7 to 1.2.

Examples of the alkenyl group having 4 or more and 20 or less carbonatoms in the component (A) include a butenyl group, a pentenyl group, ahexenyl group, a heptenyl group, an octenyl group, a nonenyl group, adecenyl group, an undecenyl group, a dodecenyl group, a tridecenylgroup, a tetradecenyl group, a pentadecenyl group, a hexadecenyl group,a heptadecenyl group, an octadecenyl group, a nonadecenyl group, and anicosenyl group. From the viewpoint of the reactivity, the carbon numberof the alkenyl group is preferably 5 or more, and more preferably 6 ormore. Similarly, from the viewpoint of the reactivity and aggregationproperties, the carbon number of the alkenyl group is preferably 16 orless, more preferably 12 or less, and further preferably 8 or less. Inparticular, the alkenyl group is preferably a hexenyl group. The alkenylgroup is preferably at the molecular chain terminal of theorganopolysiloxane, but may be present on the side chain or both.Examples of the group connected to the silicon atom other than thealkenyl group include a substituted or unsubstituted monovalenthydrocarbon group, including an alkyl group such as a methyl group, anethyl group, a propyl group and a butyl group; a cycloalkyl group suchas a cyclopentyl group and a cyclohexyl group; an aryl group such as aphenyl group, a tolyl group, and a xylyl group; an aralkyl group such asa benzyl group, a phenethyl group and a 3-phenylpropyl group; and ahalogenated alkyl group such as a 3-chloropropyl group and a3,3,3-trifluoropropyl group. Examples of the molecular structure of thegroup include straight chain, cyclic, network and straight chain havingpartly branched chain. Particularly preferred are straight chain andstraight chain having partly branched chain. In addition, this viscosityis preferably such that the hydrosilylation reaction crosslinkablesilicone composition can be dispersed in water. Specifically, theviscosity is preferably in the range of 20 to 100,000 mPa·s at 25° C.,and particularly preferably in the range of 20 to 10,000 mPa·s.

Further, from the viewpoint of the oil absorption properties of theresulting silicone powder, in the organopolysiloxane of the component(A), the content of the dimethylsiloxane unit represented by theformula: —(CH3)2SiO— is preferably 90 mol % or more based on the totalsiloxane units other than the siloxane unit at the terminal of themolecule. Similarly, from the viewpoint of improving the oil absorptionproperties of the resulting hydrosilylation reaction-crosslinkablesilicone rubber powder, preferably a cyclic or chain organopolysiloxanehaving a low polymerization degree (degree of polymerization is 3 to 20)is previously removed by stripping and the like.

The content of the alkenyl group in the component (A) is preferably0.50% by weight or more in one molecule of the organopolysiloxane, morepreferably 0.60% by weight or more, further preferably 0.70% by weightor more, further preferably 0.80% by weight or more, and furtherpreferably 0.90% by weight or more in one molecule of theorganopolysiloxane. On the other hand, the upper limit is morepreferably 5% by weight or less, and further preferably 4% by weight orless.

The component (B) is (i) a silicon organic compound having two or morehydrogen atoms connected to the silicon atom in one molecule, whereinthe hydrogen atoms are not more than 40% based on the number of siliconatoms in one molecule; and/or (ii) a silicon organic compound having twoor more hydrogen atoms connected to the silicon atom in one molecule andhaving a trifunctional siloxane unit or a tetrafunctional siloxane unit.The silicon organic compound (i) preferably has two or more hydrogensconnected to the silicon atom in one molecule. The number of thehydrogen atoms connected to the silicon atom in one molecule ispreferably not more than 40% based on the number of silicon atoms in onemolecule, more preferably not more than 30%, not more than 25%, not morethan 20%, not more than 15%, and further preferably not more than 10%.With respect to the silicon organic compound (ii), by having thetrifunctional siloxane unit or the tetrafunctional siloxane unit, evenif the unreacted portion of SiH remains, the aggregation of siliconeparticles over time is hardly affected due to the stereostructure. Fromthe viewpoint of reactivity, the trifunctional siloxane unit ispreferred. The molecular structure of the component (B) is exemplifiedby straight chain, cyclic, network and straight chain having partiallybranched. In addition, the viscosity is preferably such that thehydrosilylation reaction crosslinkable silicone composition can bedispersed in water. Specifically, the viscosity is preferably in therange of 1 to 10,000 mPa·s at 25° C.

Regarding the ratio of the components (A) and (B) in the composition,the molar ratio of the content of the alkenyl group (Alk) in thecomponent (A) to the content of the hydrogen atom (H) connected to thesilicon atom in the component (B) is:

H/Alk=0.7 to 1.2

By reacting (A) and (B) within the ratio, silicone particles of thepresent invention can be prepared. Regarding the molar ratio of H:Alk,the preferable lower limit is H/Alk=0.8 or more, more preferably 0.85 ormore, 0.90 or more, 0.95 or more, and 1.0 or more. If the ratio is lowerthan the lower limit, the alkenyl group remains. The preferably upperlimit of the silicone particle powder is 1.15 or less, more preferably1.10 or less, 1.05 or less, and 1.00 or less. If the ratio is higherthan the upper limit, the unreacted hydrogen atom connected to thesilicon atom tends to remain after the reaction. On the other hand, ifthe molar ratio is lower than the lower limit, the unreacted alkenylgroup tends to remain after the reaction. By leaving these unreactedsubstances, silicone particles are aggregated and absorbed oil remainsin the particles, and then the properties of the article obtained byusing the silicone particles may be adversely affected. When the abovealkenyl group is a hexenyl group and H/Alk is 0.9 to 1.1, particularlyclose to 1.0, the aggregation of silicone particles over time is mosteffectively inhibited.

The powder particle size is a measurement of silicone particles whichare in the form of powder after drying. The powder particle size ismeasured by the median diameter (corresponding to 50% cumulativedistribution of silicone particles, D50) of silicone particles, asidentified by a laser diffraction type particle size distributionmeasuring device using a dispersion medium such as ethanol. The siliconeparticles according to the present invention are in the form ofsecondary particles obtained by aggregating a plurality of primaryparticles of silicone particles. The powder particle size is obtained bydirectly measuring the secondary particle size of silicone particles.

The powder particle size of silicone particles according to the presentinvention depends on the particle size of primary particles as thecomponent of powder particles. Preferred range of the powder particlesize is from 0.5 to 50 μm. The lower limit of this suitable range ispreferably 1 μm, and more preferably 2 μm and 3 μm. Also, the upperlimit of this suitable range is preferably 45 μm, more preferably 40 μm,35 μm, 30 μm, 25 μm and 20 μm. If the size is smaller than the range,the crosslinking reaction hardly progresses, the particles tend toadhere to other particles, and then only the aggregated crosslinkedproduct can be obtained. If the size is larger than the range, thecompounding properties as particles in cosmetic materials and paints areimpaired, and the feeling in use is poor.

On the other hand, silicone particles according to the present inventionare primary particles before aggregation in a water dispersed formduring the production. The particle size thereof is preferably 1 to 10μm. If the primary particle size is lower than the lower limit, thecrosslinking reactivity is poor. If the size is larger than the upperlimit, the feeling in use and the compounding stability are impaired.

The hardness of silicone particles is preferably in the range of 5 to70, as measured by a JIS A hardness meter specified in JIS K 6301 whensilicone particle composition is cured into a sheet form. The hardnessis more preferably 60 or less, and further preferably 50 or less. Inparticular, when the rubber hardness is within the above range, theresulting silicone particles are sufficiently suppressed in aggregationproperties, and tend to have improved flowability, dispersibility,feeling of smoothness, and soft touch.

The silicone particles of the present invention are silicone particlesin which the content of the hydrogen connected to the silicon atom perunit mass is 300 ppm or less, and the silicon atom in the siloxane as acomponent for silicone particles is crosslinked with the other siliconatom via an alkylene group having a carbon number of 4 to 20 (the firstembodiment as described above); or silicone particles obtained by thecrosslinking reaction of (A) an organopolysiloxane having two or morealkenyl groups having 4 or more and 20 or less carbon atoms in onemolecule and (B) a specified organohydrogenpolysiloxane (the secondembodiment as described above). From the viewpoint of inhibiting theaggregation of silicone particles, the relationship between the JIS-Ahardness (Vα) of silicone particles and the powder particle size (Vβ) ispreferably satisfies the following relationship.

Vα×Vβ≤1,200

For silicone particles according to the above embodiments of the presentinvention, when the hardness and the particle size satisfy the aboverelationship, the aggregation of silicone particles is effectivelyinhibited. If the embodiments of the present invention described aboveare not satisfied, even if the hardness and the particle diametersatisfy the above relationship, the aggregation of silicone particles isnot necessarily inhibited.

By emulsifying and curing the crosslinkable composition for formingsilicone particles, the particle diameter of silicone particles can beeasily adjusted. Examples of the emulsification include a method using asurfactant, an emulsification method using a mechanical shearing methodusing a mixing apparatus such as a stirring apparatus and an ultrasonicvibration machine, and the like. In this case, it is preferable to coolthe curable silicone composition in advance before curing the aqueousdispersion of the crosslinkable composition for forming siliconeparticles to control its curability. When a surfactant is used, examplesof the surfactant include nonionic, anionic, cationic and betaine typesurfactants. The particle size of the resulting silicone particlesvaries depending on the type and content of the surfactant. In order toprepare silicone particles having smaller particle size, the additionamount of the surfactant is preferably in the range of 0.5 to 50 partsby mass based on 100 parts by mass of the crosslinkable composition forforming silicone particles. On the other hand, in order to preparesilicone particles having larger particle size, the addition amount ofthe surfactant is preferably in the range of 0.1 to 10 parts by massbased on 100 parts by mass of the crosslinkable composition for formingsilicone particles. The addition amount of water as the dispersionmedium is preferably in the range of 20 to 1,500 parts by mass, or 50 to1,000 parts by mass based on 100 parts by mass of the crosslinkablecomposition for forming silicone particles. Since these surfactants areblended in the cosmetic as they are, silicone particles according to thepresent invention can be used as the cosmetic raw material.

In addition, it is preferable to use an emulsifier for uniformlydispersing the crosslinkable composition for forming silicone particles.Examples of the emulsifier include a homomixer, a paddle mixer, aHenschel mixer, a homodisper, a colloid mill, a propeller stirrer, ahomogenizer, an inline continuous emulsifier, an ultrasonic emulsifier,and a vacuum kneader.

The aqueous dispersion of silicone particles can be prepared by standingthe aqueous dispersion containing the crosslinkable composition forforming silicone particles as prepared by the above method at hightemperature or at room temperature, and curing the crosslinkablecomposition for forming silicone particles in the aqueous dispersion.When heating the aqueous dispersion of the crosslinkable composition forforming silicone particles, the heating temperature is preferably 100°C. or less, and particularly preferably 10 to 95° C. Examples of amethod of heating the aqueous dispersion of the crosslinkablecomposition for forming silicone particles include a method of directlyheating the aqueous dispersion and a method of adding the aqueousdispersion into hot water. Silicone particles can then be prepared byremoving water from the aqueous dispersion of silicone particles.Examples of the method of removing water include a method of drying byusing a vacuum dryer, a hot air circulation type oven, or a spray dryer.The crosslinkable composition for forming silicone particles is cured toform silicone particles by standing at room temperature or by heating.

It is preferable to use an aqueous surfactant solution in order tostabilize the crosslinkable composition for forming silicone particlesin the form of particles in the aqueous dispersion. The addition amountof the surfactant is preferably from 0.1 to 20 parts by mass, morepreferably from 0.2 to 10 parts by mass, and particularly preferablyfrom 0.2 to 5 parts by mass, based on 100 parts by mass of thecrosslinkable composition for forming silicone particles. The additionamount of water is preferably from 40 to 2,000 parts by mass, andparticularly preferably from 40 to 1,000 parts by mass, based on 100parts by mass of the crosslinkable composition for forming siliconeparticles. The reasons are as follows. If the addition amount of wateris less than 40 parts by mass based on 100 parts by mass of thecrosslinkable composition for forming silicone particles, the uniformaqueous dispersion of the crosslinkable composition for forming siliconeparticles is hardly formed. If the addition amount is more than 2,000parts by mass, the productivity of silicone particles is remarkablydeteriorated.

On the other hand, in the step of removing water by the above method, itis known to methylate the remained hydrogen group connected to thesilicon atom at the surface of silicone particles by a heating step, asa conventional technique. However, it is known that an unreactedhydrogen group connected to the silicon atom in silicone particlesremains even after such a heating step. Although not bound by theory, itis believed that even if all the hydrogen group connected to the siliconatom at the surface of silicone particles, the hydrogen group connectedto the silicon atom remains inside the particles, and the hydrogen groupeffects on the powder particle size of silicone particles over time. Forthis reason, depending on the prior art, it is impossible to obtainsilicone particles in which the amount of hydrogen connected to thesilicon atom is suppressed as low as the present invention.

The content of the hydrogen group connected to the silicon atom insilicone particles is not decreased even if a method of pulverizing theresulting silicone particles obtained by curing the crosslinkablecomposition for forming silicone particles by a pulverizer such as agrinder, or curing the particles by a vacuum dryer, a hot aircirculation oven, or curing by spraying the particles with a sprayersuch as a spray dryer in a hot air is performed.

Since the water-based dispersion of crosslinkable composition forforming silicone particles is easy to stabilize, the water to be usedhas little metal ion or halogen ion, and the electrical conductivity ispreferably 1 μS/cm or less. Particularly preferred is an ion-exchangedwater having an electrical conductivity of 0.5 μS/cm or less.

By obtaining fine particles of the mixture of the component (A) and thecomponent (B) to prepare a water dispersible liquid, and then adding thecatalyst for hydrosilylation reaction as the component (C) to obtain acrosslinkable composition for forming silicone particles, workability isimproved, and it is hard for fine particles in the aqueous dispersion toaggregate.

The aqueous dispersion of silicone particles can be prepared by standingthe aqueous dispersion of the crosslinkable composition for formingsilicone particles as prepared by the above method at high temperatureor at room temperature, and curing the crosslinkable composition forforming silicone particles in the aqueous dispersion.

When heating the aqueous dispersion of the crosslinkable composition forforming silicone particles, the heating temperature is preferably 100°C. or less, and particularly preferably 10 to 95° C. Examples of amethod of heating the aqueous dispersion of the crosslinkablecomposition for forming silicone particles include a method of directlyheating the aqueous dispersion and a method of adding the aqueousdispersion into hot water.

As the curing reaction for preparing silicone particles, thehydrosilylation reaction catalyst (C) component can be used. It is acatalyst that promotes curing of the crosslinkable composition forforming silicone particles, and is preferably a platinum group metal(group VIII of the periodic table) or a compound thereof. Preferredexamples include platinum and/or platinum compounds such as finelydivided platinum; solutions of chloroplatinic acid or chloroplatinicacid in alcohol; composites of chloroplatinic acid and alkenylsiloxanes;composites of platinum-diketones; platinum-alkenylsiloxane complexes;platinum-olefins complexes; platinum on silica, alumina, and similarcarriers; or thermoplastic resins comprising platinum compounds. Asother platinum group metal catalysts, rhodium, ruthenium, iridium or apalladium compound is exemplified. In addition, in order to carry outthe hydrosilylation reaction, it is also possible to use hydrogenperoxide in water as the catalyst. Furthermore, a non-platinum-basedhydrosilylation catalyst such as iron or iron/cobalt may be used.

Silicone particles are not particularly limited in shape and properties,and may be elastomer (rubber) particles, resin (resin) particles, orcomposite silicone particles of the same kind or different kinds. Assilicone particles of the present invention, silicone elastomerparticles having elasticity are more preferable. Silicone elastomerparticles are used as cosmetic materials, coating agents, and the likeas a feel improver. Silicone resin particles and silicone elastomerparticles coated with silicone resin or silica fine particles are lessagglomerated but have a hard texture, and may not have a soft touch suchas in silicone elastomer particles in some cases.

The silicone particles of the present invention may be surface-treatedif necessary. Typically, the particles are silica-coated, which mayfurther improve the aggregation suppressing effect of silicone particlesof the present invention. Further, other known hydrophilic treatmentagents, hydrophobic treatment agents or the like may be used for surfacetreatment.

The silicone particles of the present invention may be in the form ofdried powder particles or may be in the form of a water-based suspensiondispersed in a hydrophilic dispersion medium such as water, alcohol orpolyhydric alcohol. It may be in the form of an oily silicone particlescomposition dispersed or swollen in an oil agent.

The cosmetic material of the present invention will be described indetail.

This cosmetic material is characterized by containing theabove-mentioned silicone particle. Examples of the cosmetic materialinclude cleansing cosmetic material such as soaps, body shampoos, andfacial cleansing creams; basic cosmetic material such as cosmeticlotion, cream/milky lotion, and pack; base makeup cosmetic material suchas a face powder and foundation; eye cosmetic material such as lipstick,blusher, eye shadow, eyeliner and mascara; makeup cosmetic material suchas manicure; hair cosmetic material such as shampoo, hair rinse, hairconditioner, hair growth agent, hair tonic and hair dye; aromaticcosmetic material such as perfume and eau de cologne; toothpaste; bathagent; and special cosmetic material such as depilatory agent, shavinglotion, antiperspirant/deodorant, and sunscreen agent. Examples of thedosage form of the cosmetic material include aqueous liquid, oilyliquid, emulsion, cream, foam, semi-solid, solid and powder. Thiscosmetic material can also be used by spraying.

In this cosmetic material, the content of silicone particles ispreferably in the range of 0.5 to 99.0% by mass, and particularlypreferably in the range of 1.0 to 95% by mass in the cosmetic material.This is because, when the content of silicone particles exceeds theupper limit of the above range, the effect as a cosmetic material islost, and if it is less than the lower limit of the above range, thefeeling of use of the cosmetic material and the like are difficult toimprove.

As a cosmetic raw material, it is also possible to disperse siliconeparticles in an aqueous phase or an oil phase using the cosmeticcomponent described in the following paragraphs as a medium (aqueousmedium or oil medium). Examples of the aqueous medium include water suchas pure water, ion exchanged water, alkaline ion water, deep sea water,wave water, and natural water; and an aqueous medium being miscible withwater, for example, lower alcohols such as ethyl alcohol, propyl alcoholand isopropyl alcohol; and polyhydric alcohols such as glycerin, 1,3butylene glycol, isoprene glycol, and dipropylene glycol.

Examples of the oily medium (oil agent) include silicone oil,hydrocarbon oil, higher fatty acid, higher alcohol, ester oil (includingfat and oil), ether oil, mineral oil, fluorine oil and the like. Amongthem, silicone oil, hydrocarbon oil, ester oil is more preferable fromthe viewpoint of feeling of use. Specific examples thereof includesilicone oils such as dimethyl polysiloxane, methyl hydrogenpolysiloxane, methyl phenyl polysiloxane, polyether modifiedorganopolysiloxane, fluoroalkyl/polyoxyalkylene co-modifiedorganopolysiloxane, alkyl modified organopolysiloxane, terminal modifiedorganopolysiloxane, fluorine modified organopolysiloxane,amodimethicone, amino modified organopolysiloxane, acrylic silicone, andtrimethylsiloxysilicic acid; hydrocarbon oils such as liquid paraffin,vaseline and squalane; and ester oils such as myristyl myristate, hexyllaurate, decyl oleate, isopropyl myristate, hexyldecyl dimethyloctanoate, glyceryl monostearate, diethyl phthalate, ethylene glycolmonostearate, octyl oxystearate, isononyl isononanoate, and isotridecylisononanoate. One or more of these oil agents can be used. Further, thecontent of the oil agent based on the total amount of the water-in-oiltype emulsified cosmetic material used in the present invention ispreferably from 10 to 50% by mass, and more preferably from 20 to 40% bymass, from the viewpoint of feeling in use and the storage stability.

The cosmetic material of the present invention may contain componentscommonly used in cosmetic materials, water, coloring agents, alcohols,water-soluble polymers, film forming agents, oil agents, oil-solublegelling agents, organic modified clay mineral, surfactant, resin, salts,humectant, antiseptic, antimicrobial agent, antioxidant, pH adjuster,chelating agent, refreshing agent, anti-inflammatory agent, componentfor skin beauty (whitening agent, cell activation additives, agents forimproving skin roughness, blood circulation promoters, skin astringents,antiseborrheic agents), vitamins, amino acids, nucleic acids, hormones,clathrate compounds, physiologically active substances, medicinal activeingredients, and perfumes, and these are not particularly limited. Thecontent of each of components of the cosmetic material is, excludingwater, preferably in the range of 0.5 to 99.0% by mass, and particularlypreferably in the range of 1.0 to 95% by mass in the cosmetic material.When the content of one component of the cosmetic material exceeds theupper limit of the above range, the feeling in use as the cosmeticmaterial is not preferable. In addition, when it is added, if thecontent is less than the lower limit of the above range, it will bedifficult to obtain effects such as improvement in feeling of use in thecosmetic material. In addition, as for cosmetic components and blendingamounts thereof, those disclosed in Japanese Unexamined PatentPublication No. 2015-113303 are incorporated herein by reference.

Water does not contain any harmful components to the human body and justneeds to be clean, and examples thereof include tap water, purifiedwater, mineral water, and deep sea water. In the case where the cosmeticmaterial of the present invention is of an aqueous base, an optionalwater-soluble additive component can be blended in the water phase aslong as the effect of the present invention is not impaired. Inaddition, for the purpose of improving the storage stability and thelike of the cosmetic material, well-known pH adjusting agents,preservatives, antimicrobial agents or antioxidants can be added asappropriate.

Examples of the colorant include inorganic red pigments such as red ironoxide, iron oxide, iron hydroxide and iron titanate, inorganic brownpigments such as γ-iron oxide, inorganic yellow pigments such as yellowiron oxide and ocher, inorganic black pigments such as black iron oxideand carbon black, inorganic purple pigments such as manganese violet andcobalt violet, inorganic green pigments such as chromium hydroxide,chromium oxide, cobalt oxide and cobalt titanate, inorganic bluepigments such as Prussian blue and ultramarine blue, lake colorants oftar-based pigments of Red No. 3, Red No. 104, Red No. 106, Red No. 201,Red No. 202, Red No. 204, Red No. 205, Red No. 220, Red No. 226, Red No.227, Red No. 228, Red No. 230, Red 401 No. 505, yellow No. 4, yellow No.5, yellow No. 202, yellow No. 203, yellow No. 204, yellow No. 401, blueNo. 1, blue No. 2, blue No. 201, blue No. 404, green No. 3, Green No.201, Green No. 204, Green No. 205, Orange No. 201, Orange No. 203,Orange No. 204, Orange No. 206 and Orange No. 207 and the like, lakecoloring pigments of natural pigments such as carminic acid, laccaicacid, carthamin, brasiline, and crocin; pearl pigments such as titaniumoxide-coated mica, titanium mica, iron oxide treated mica titanium,titanium oxide coated mica, bismuth oxychloride, titanium oxide coatedbismuth oxychloride, titanium oxide coated talc, fish scale foil andtitanium oxide coated colored mica; and metal powder of aluminum, gold,silver, copper, platinum, stainless steel and the like.

It is preferable that these colorants are subjected to a water repellenttreatment. Complexes of these coloring agents or those obtained bysurface treatment with general oil, silicone compound, fluorinecompound, surfactant or the like can also be used, and one or two ormore thereof can be used.

An example of such a water repellent treatment is one in which acolorant is treated with various water repellent surface treatmentagents, and examples thereof include organosiloxane treatment such asmethyl hydrogen polysiloxane treatment, silicone resin treatment,silicone gum treatment, acrylic silicone treatment, and fluorinatedsilicone treatment, metal soap treatment such as zinc stearatetreatment, silane treatment such as silane coupling agent treatment andalkylsilane treatment, perfluoroalkylsilane, perfluoroalkylphosphoricacid ester salt, and fluorine compound treatment such asperfluoropolyether treatment and amino acid treatment such asN-lauroyl-L-lysine treatment, oil treatment such as squalane treatment,acrylic treatment such as alkyl acrylate treatment, etc., and one ormore of these can be used in combination.

As the alcohols, one or more selected from lower alcohols, sugaralcohols and higher alcohols can be used. Specific examples includelower alcohols such as ethanol and isopropanol; sugar alcohols such assorbitol and maltose; and higher alcohols such as lauryl alcohol,myristyl alcohol, palmityl alcohol, stearyl alcohol, behenyl alcohol,hexadecyl alcohol, oleyl alcohol, isostearyl alcohol, hexyl dodecanol,octyldodecanol, cetostearyl alcohol, 2-decyltetradecinol, cholesterol,sitosterol, phytosterol, lanosterol, POE cholesterol ether, monostearylglycerin ether (batyl alcohol), and monooleyl glyceryl ether (selachylalcohol).

The water-soluble polymer is blended for the purpose of improving thefeeling of use of the cosmetic material and may be amphoteric, cationic,anionic, nonionic, or water-swellable clay mineral as long as it is usedin ordinary cosmetic materials, and one type or two or more types ofwater-soluble polymers can be used in combination. These water-solublepolymers have a thickening effect on water-containing components, andare therefore particularly useful when obtaining a gel-likewater-containing cosmetic material, a water-in-oil emulsion cosmeticmaterial, or an oil-in-water emulsion cosmetic material.

Examples of amphoteric water-soluble polymers include amphoteric starch,dimethyldiallylammonium chloride derivatives (for example,acrylamide/acrylic acid/dimethyldiallylammonium chloride copolymer,acrylic acid/dimethyldiallylammonium chloride copolymer), andmethacrylic acid derivatives (for example, polymethacryloyl ethyldimethyl betaine, N-methacryloyloxyethyl N, N-dimethyl ammonium-α-methylcarboxy betaine, alkyl methacrylate copolymer, etc.).

Examples of the cationic water-soluble polymers include quaternarynitrogen-modified polysaccharides (for example, cation modifiedcellulose, cation modified hydroxyethyl cellulose, cation modified guargum, cation modified locust bean gum, cation modified starch and thelike), dimethyl diallyl ammonium chloride derivative (for example,dimethyldiallylammonium chloride-acrylamide copolymer,polyethyldimethylmethylene chloride piperidinium etc.), vinylpyrrolidonederivatives (for example, vinylpyrrolidone-dimethylaminoethylmethacrylic acid copolymer salt,vinylpyrrolidone-methacrylamidopropyltrimethylammonium chloridecopolymers, vinylpyrrolidone-methylvinylimidazolium chloride copolymer,etc.), and methacrylic acid derivatives (e.g.,methacryloylethyldimethylvetain-chloride methacryloylethyl trimethylammonium 2-hydroxyethyl methacrylate copolymer, methacryloyl ethyldimethyl betaine chloride methacryloyloxyethyl trimethylammonium-methacrylate methoxy polyethylene glycol copolymer) and thelike.

Examples of the anionic water-soluble polymer include polyacrylic acidor an alkali metal salt thereof, polymethacrylic acid or an alkali metalsalt thereof, hyaluronic acid or an alkali metal salt thereof,acetylated hyaluronic acid or an alkali metal salt thereof, and awater-soluble polymer of an aliphatic carboxylic acid such as ahydrolyzate of a methyl vinyl ether-maleic anhydride copolymer or ametal salt thereof, carboxymethyl cellulose or an alkali metal saltthereof, a methyl vinyl ether-maleic half ester copolymer, an acrylicresin alkanol amine solution, and carboxyvinyl polymers.

Examples of the nonionic water-soluble polymers include natural polymercompounds such as polyvinylpyrrolidone, highly polymerized polyethyleneglycol, vinylpyrrolidone/vinyl acetate copolymer,vinylpyrrolidone/dimethylaminoethyl methacrylate copolymer,vinylcaprolactam/vinylpyrrolidone/dimethylaminoethyl methacrylatecopolymer, cellulose or derivatives thereof (e.g., methylcellulose,ethylcellulose, hydroxyethylcellulose, hydroxypropylcellulose,carboxymethylcellulose), keratin and collagen or derivatives thereof,calcium alginate, pullulan, agar, gelatin, tamarind seed polysaccharide,xanthan gum, carrageenan, high methoxyl pectin, low methoxyl pectin,guar gum, pectin, gum arabic, crystalline cellulose, arabinogalactan,karaya gum, tragacanth gum, alginic acid, albumin, casein, curdlan,duran gum, dextran, quince seed gum, tragacanth gum, chitin/chitosanderivatives, starch (rice, corn, potato, wheat, etc.), keratin andcollagen or its derivatives.

The water-swellable clay mineral is an inorganic water-soluble polymer,which is a kind of a colloid-containing aluminum silicate having athree-layer structure and is generally represented by the formula:

(X,Y)₂₋₃(Si,Al)₄O₁₀(OH)₂Z_(1/3) .nH₂O

(where X is Al, Fe(III), Mn(III) or Cr(III), Y is Mg, Fe(II), Ni, Zn, orLi, Z is K, Na, or Ca).

Specific examples of such inorganic water-soluble polymers arebentonite, montmorillonite, paidelite, nontronite, saponite, hectorite,magnesium aluminum silicate, and silicic anhydride, which may be eithernatural products or synthetic products.

As the oil agent, any one of solid, semi-solid and liquid can be used.Specifically, one kind or two or more kinds selected from silicone oil,hydrocarbon oil, ester oil, vegetable fats and oils, animal fats andoils, fatty acids, higher alcohols, triglycerides, artificial sebum, andfluorine-based oils can be used.

Examples of the silicone oil include a cyclic organopolysiloxane such ashexamethylcyclotrisiloxane (D3), octamethylcyclotetrasiloxane (D4),decamethylcyclopentasiloxane (D5), dodecamethylcyclohexasiloxane (D6),1,1-diethyl hexamethylcyclotetrasiloxane,phenylheptamethylcyclotetrasiloxane,1,1-diphenylhexamethylcyclotetrasiloxane,1,3,5,7-tetravinyltetramethylcyclotetrasiloxane, 1,3,5,7-tetramethylcyclotetrasiloxane,1,3,5,7-tetracyclohexyltetramethylcyclotetrasiloxane, tris(3,3,3-trifluoropropyl) trimethylcyclotrisiloxane, 1,3,5,7-tetra(3-methacryloxypropyl) tetramethylcyclotetrasiloxane, 1,3,5,7-tetra(3-acryloxypropyl) tetramethylcyclotetrasiloxane, 1,3,5,7-tetra(3-carboxypropyl) tetramethylcyclotetrasiloxane, 1,3,5,7-tetra(3-vinyloxypropyl) tetramethylcyclotetrasiloxane, 1,3,5,7-tetra(p-vinylphenyl) tetramethylcyclotetrasiloxane, 1,3,5,7-tetra[3-(p-vinylphenyl) propyl] tetramethylcyclotetrasiloxane, 1,3,5,7-tetra(N-acryloyl-N-methyl-3-aminopropyl) tetramethylcyclotetrasiloxane, and1,3,5,7-tetra (N, N-bis (lauroyl)-3-aminopropyl)tetramethylcyclotetrasiloxane. Examples of linear organopolysiloxaneinclude dimethylpolysiloxane capped at both molecular chain terminalswith trimethylsiloxy groups (low viscosity such as 2 cst or 6 cst or thelike with a high viscosity of 1,000,000 cst, highly viscous dimethylsilicone), organohydrogen polysiloxane, trimethyl Siloxyl group-cappedmethylphenyl polysiloxane, dimethylsiloxane-methylphenylsiloxanecopolymer capped at both molecular terminals with trimethylsiloxygroups, diphenylpolysiloxane capped at both molecular terminals withtrimethylsiloxy groups, dimethylsiloxane capped at both molecularterminals with trimethylsiloxy groups ⋅ diphenyl Siloxane copolymer,trimethylpentaphenyltrisiloxane, phenyl (trimethylsiloxy) siloxane,methylalkyl polysiloxane capped at both molecular terminals withtrimethylsiloxy groups, trimethylsiloxane at both molecular chainterminals A blocked dimethylpolysiloxane-methylalkylsiloxane copolymer,dimethylsiloxane capped at both molecular terminals with trimethylsiloxygroups, methyl (3,3,3-trifluoropropyl) siloxane copolymer, α,ω-dihydroxypolydimethylsiloxane, α, ω-diethoxypolydimethylsiloxane,1,1,1,3,5,5,5-heptamethyl-3-octyltrisiloxane,1,1,1,3,5,5,5-heptamethyl-3-Dodecyltrisiloxane,1,1,1,3,5,5,5-heptamethyl-3-hexadecyltrisiloxane,tristrimethylsiloxymethylsilane, tristrimethylsiloxyalkylsilane,tetrakistrimethylsiloxysilane, tetramethyl-1,3-Dihydroxydisiloxane,octamethyl-1,7-dihydroxytetrasiloxane,hexamethyl-1,5-diethoxytrisiloxane, hexamethyldisiloxane,octamethyltrisiloxane, higher alkoxy-modified silicone, and higher fattyacid-modified silicone.

Examples of hydrocarbon oils include liquid paraffin, light liquidisoparaffin, heavy liquid isoparaffin, petrolatum, n-paraffin,isoparaffin, isododecane, isohexadecane, polyisobutylene, hydrogenatedpolyisobutylene, polybutene, ozokerite, ceresin, microcrystalline wax,paraffin wax, polyethylene wax, polyethylene.polypropylene wax,squalane, squalene, pristane, and polyisoprene.

Examples of ester oil include hexyldecyl octanoate, cetyl octanoate,isopropyl myristate, isopropyl palmitate, butyl stearate, hexyl laurate,myristyl myristate, oleyl oleate, decyl oleate, octyl dodecyl myristate,octyl dodecyl myristate, hexyldecyl dimethyl octanoate, cetyl lactate,myristyl lactate, diethyl phthalate, dibutyl phthalate, lanolin acetate,ethylene glycol monostearate, propylene glycol monostearate, propyleneglycol dioleate, glyceryl monostearate, glyceryl monooleate, glyceryltri 2-ethylhexanoate, trimethylolpropane tri-2-ethylhexanoate,ditrimethylolpropane triethylhexanoate, (isostearic acid/sebacic acid)ditrimethylolpropane, trimethylolpropane trioctanoate,trimethylolpropane triisostearate, diisopropyl adipate, diisobutyladipate, 2-hexyldecyl adipate, di-2-heptylundecyl adipate, diisostearylmalate, monoisostearic acid hydrogenated castor oil, monoisostearic acidN-alkyl glycol, octyldodecyl isostearate, isopropyl isostearate,isocetyl isostearate, ethylene glycol di-2-ethylhexanoate, cetyl2-ethylhexanoate, pentaerythritol tetra-2-ethylhexanoate, octyldodecyl gurn ester, ethyl oleate, octyldodecyl oleate, neopentyl glycoldicaprate, triethyl citrate, 2-ethylhexyl succinate, dioctyl succinate,isocetyl stearate, diisopropyl sebacate, di-2-ethylhexyl sebacate,diethyl sebacate, dioctyl sebacate, dibutyl octyl sebacate, cetylpalmitate, octyldodecyl palmitate, octyl palmitate, 2-ethylhexylpalmitate, 2-hexyldecyl palmitate, 2-heptylundecyl palmitate,cholesteryl 12-hydroxystearate, dipentaerythritol fatty acid ester,2-hexyldecyl myristate, ethyl laurate, N-lauroyl L-glutamic acid2-octyldodecyl ester, N-lauroyl-L-glutamic acid di(cholesteryl/behenyl/octyldodecyl), N-lauroyl-L-glutamic acid di(cholesteryl/octyldodecyl), N-lauroyl-L-glutamic acid di(phytosteryl/behenyl/octyldodecyl), N-lauroyl-L-glutamic acid di(phytosteryl/octyldodecyl), N-lauroylsarcosine isopropyl, diisostearylmalate, neopentyl glycol dioctanoate, neopentanoic acid Isodecylneopentanoate, isotridecyl neopentanoate, isostearyl neopentanoate,isononyl isononanoate, isotridecyl isononanoate, octyl isononanoate,isotridecyl isononanoate, diethyl pentane diol dineopentanoate, methylpentane diene dineopentanoate, octyl dodecyl neodecanoate, 2-butyldioctanoate-2-ethyl-1,3-propanediol, pentaerythrityl tetraoctanoate,hydrogenated rosin pentaerythrityl, pentaerythrityl triethylhexanoate,(palmitic acid/stearic acid/rosin acid) dipentaerythrityl, polyglyceryltetraisostearate, polyglyceryl nonanaisostearate-10, deca (erucicacid/isostearic acid/ricinoleic acid) polyglyceryl-8, (hexyldecanoicacid/sebacic acid) diglyceryl oligoester, glycol distearate (ethyleneglycol distearate), diisopropyl dimer linoleate, diisostearyl dimerlinoleate, di (isostearyl/phytosteryl) dimer dilaurate, dimer linoleicacid (phytosteryl/behenyl) die margined linoleic acid,(phytosteryl/isostearyl/cetyl/stearyl/behenyl), dimer linoleic aciddimer linoleyl, diisostearic acid dimer linoleyl, dimer linoleylhydrogenated rosin condensate, dimer rino rale hydrogenated rosincondensate, dimer linoleic acid hydrogenated castor oil, hydroxyalkyldimer linoleyl ether, glyceryl triisooctanoate, glyceryl triisostearate,glyceryl trimyristate, glyceryl triisopalmitate, trioctanoic acidglyceryl trioleate, glyceryl trioleate, glyceryl diisostearate, glyceryltri (caprylic/capric) acid, glyceryl tri (caprylic/capric acid/myristicacid/stearic acid), hydrogenated rosin triglyceride (hydrogenated estergum), rosin triglyceride (ester gum), glyceryl eicosane behenate,glyceryl di-2-heptylundecanoate, diglyceryl myristate isostearate,cholesteryl acetate, cholesteryl nonanoate, cholesteryl phosphate,cholesteryl isostearate, cholesteryl oleate, cholesteryl12-hydroxystearate, macadamia nut oil fatty acid cholesteryl, macadamianut oil fatty acid phytosteryl, phytosteryl isostearate, cholesterylsoft lanolin fatty acid cholesteryl, hard lanolin fatty acidcholesteryl, long chain branched fatty acid cholesteryl, long chainα-hydroxy fatty acid cholesteryl, octyl dodecyl ricinoleate, octyldodecyl lanolin fatty acid, octyl dodecyl erucate, isostearic acidhydrogenated castor oil, avocado oil fatty acid ethyl, and lanolin fattyacid isopropyl.

Examples of natural animal and vegetable fats and oils andsemi-synthetic fats and oils include avocado oil, linseed oil, almondoil, Ibota wax, eno oil, olive oil, cacao butter, kapok row, kaya oil,carnauba wax, liver oil, candelilla wax, beef tallow, beef tallow fat,sesame oil, cinnamon oil, jojobaro, olive oil, rice bran oil, sesameoil, rice germ oil, rice bran oil, sugarcane wax, sasanqua oil,safflower oil, shea butter, squalane, shellac wax, turtle oil, soybeanoil, tea seed oil, camellia oil, evening primrose oil, corn oil, lardoil, rapeseed oil, Japanese tung oil, rice bran oil, germ oil, horsefat, persic oil, palm oil, palm kernel oil, castor oil, hydrogenatedcastor oil, castor oil fatty acid methyl ester, sunflower oil, grapeoil, bayberry wax, jojoba oil, additives jojoba ester, macadamia nutoil, beeswax, mink oil, cottonseed oil, cotton wax, Japanese wolf berrywolf berry kernel oil, montan wax, coconut oil, hardened coconut oil,tall oil fatty acid glyceride, sheep fat, peanut oil, lanolin, liquidlanolin, reduced lanolin, lanolin alcohol, hard lanolin, acetatelanolin, lanolin fatty acid isopropyl, POE lanolin alcohol ether, POElanolin alcohol acetate, lanolin fatty acid polyethylene glycol, POEhydrogenated lanolin alcohol ether, egg yolk oil and the like. Here, POEmeans polyoxyethylene.

Examples of higher fatty acid includes lauric acid, myristic acid,palmitic acid, stearic acid, behenic acid, undecylenic acid, oleic acid,linoleic acid, linolenic acid, arachidonic acid, eicosapentaenoic acid(EPA), docosahexaenoic acid (DHA) Isostearic acid, and 12-hydroxystearicacid.

Examples of higher alcohols include lauryl alcohol, myristyl alcohol,palmityl alcohol, stearyl alcohol, behenyl alcohol, hexadecyl alcohol,oleyl alcohol, isostearyl alcohol, hexyl dodecanol, octyl dodecanol,cetostearyl alcohol, 2-decyl tetradec norle, cholesterol, sitosterol,phytosterol, lanosterol, POE cholesterol ether, monostearyl glycerinether (batyl alcohol), and monooleyl glyceryl ether (celkyl alcohol).

As the fluorine-based oil agent, perfluoropolyether, perfluorodecalin,perfluorooctane and the like can be mentioned, and one or more of theseoil agents can be used as required.

Examples of the oil-soluble gelling agent include metallic soaps such asaluminum stearate, magnesium stearate and zinc myristate; amino acidderivatives such as N-lauroyl-L-glutamic acid and α, γ-di-n-butylamine;dextrin fatty acid esters such as dextrin palmitic acid esters, dextrinstearate esters, and dextrin 2-ethylhexanoic acid palmitate; sucrosefatty acid esters such as sucrose palmitate esters and sucrose stearateesters; ructooligosaccharide fatty acid esters such as inulin stearateand fructooligosaccharide 2-ethylhexanoic acid ester; benzylidenederivatives of sorbitol such as monobenzylidene sorbitol anddibenzylidenesorbitol; and clay minerals modified with organic compoundssuch as dimethylbenzyldodecylammonium montmorilonite clays and dimethyldioctadecyl ammonium montmorillonite clays, and these may be used singlyor two or more thereof may be used as needed.

As the surfactant, one or more selected from the group consisting of asilicone surfactant, an anionic surfactant, a cationic surfactant, anonionic surfactant, an amphoteric surfactant, and a semipolarsurfactant can be used in combination.

Silicone surfactants are often used as components for emulsification andwashing of oil agents, dispersions of powder, and surface treatment, andtypically include polyglyceryl-modified silicone, glyceryl-modifiedsilicone, sugar-modified silicone, fluorine polyether-modified silicone,polyether-modified silicone, carboxylic acid-modified silicone,sugar-modified silicone, linear silicone-polyether block copolymer(polysilicone-13, etc.), and long chain alkyl/polyether co-modifiedsilicone.

Examples of the anionic surfactant include saturated or unsaturatedfatty acid salts (for example, sodium laurate, sodium stearate, sodiumoleate, sodium linolenate and the like), alkyl sulfates, alkylbenzenesulfonic acids (for example, hexylbenzene sulfonic acid,octylbenzenesulfonic acid, dodecylbenzenesulfonic acid, etc.) and saltsthereof, polyoxyalkylene alkyl ether sulfates, polyoxyalkylene alkenylether sulfates, polyoxyethylene alkyl sulfate, sulfosuccinic acid alkylester salts, polyoxyalkylene sulfosuccinic acid alkyl ester salts,polyoxyalkylene alkyl phenyl ether sulfates, alkanesulfonic acid salts,octyltrimethylammonium hydroxide, dodecyltrimethylammonium hydroxide,alkyl sulfonate, polyoxyethylene alkyl phenyl ether sulfate,polyoxyalkylene alkyl ether acetate, alkyl phosphate, polyoxyalkylenealkyl ether phosphate, acyl glutamate, α-acyl sulfonate, alkylsulfonate, alkylallylsulfonate, α-olefin sulfonate,alkylnaphthalenesulfonate, alkanesulfonate, alkyl or alkenyl sulfate,alkylamide sulfate, alkyl or alkenyl phosphate, alkylamide phosphate,alkyloyl alkyl taurine salt, N-acyl amino acid salt, sulfosuccinate,alkyl ether carboxylate, amide ether carboxylate, α-sulfo fatty acidester salt, alanine derivatives, glycine derivatives, and argininederivatives. Examples of the salt include an alkali metal salt such as asodium salt, an alkaline earth metal salt such as a magnesium salt, analkanolamine salt such as a triethanolamine salt, and an ammonium salt.

Examples of the cationic surfactant include alkyltrimethylammoniumchloride, stearyltrimethylammonium chloride, lauryltrimethylammoniumchloride, cetyltrimethylammonium chloride, tallow alkyltrimethylammoniumchloride, behenyltrimethylammonium chloride, stearyltrimethylammoniumbromide, behenyltrimethylammonium bromide, distearyldimethylammoniumchloride, dicocoyldimethylammonium chloride, dioctyldimethylammoniumchloride, di(POE)oleylmethylammonium chloride (2EO), benzalkoniumchloride, alkylbenzalkonium chloride, alkyldimethylbenzalkoniumchloride, benzethonium chloride, stearyl dimethyl benzyl ammoniumchloride, lanolin-derived quaternary ammonium salt,diethylaminoethylamide stearate, dimethylaminopropylamide stearate,amidopropyldimethylhydroxypropylammonium chlorobehenate, stearoylcolaminoformylmethylpyridinium chloride, cetylpyridinium chloride, talloil alkylbenzylhydroxyethylimidazolinium chloride, and benzylammoniumsalt.

Examples of the nonionic surfactant include polyglyceryl diisostearate,diglyceryl polyhydroxystearate, isostearyl glyceryl ether,polyoxyalkylene ethers, polyoxyalkylene alkyl ethers, polyoxyalkylenefatty acid esters, polyoxyalkylene fatty acid diesters, polyoxyalkylene(hardened) castor oil, polyoxyalkylene alkylphenol, polyoxyalkylenealkyl phenyl ether, polyoxyalkylene phenyl ether, polyoxyalkylene alkylester, polyoxyalkylene alkyl esters, sorbitan fatty acid esters,polyoxyalkylene sorbitan alkyl esters, polyoxyalkylene sorbitan fattyacid ester, polyoxyalkylene sorbit fatty acid ester, polyoxyalkyleneglycerin fatty acid ester, polyglycerin alkyl ether, polyglycerin fattyacid ester, sucrose fatty acid ester, fatty acid alkanolamide, alkylglucoside, polyoxyalkylene fatty acid bisphenyl ethers, polypropyleneglycol, diethylene glycol, polyoxyethylene-polyoxypropylene blockpolymers, alkyl polyoxyethylene-polyoxypropylene block polymer ethers,polyoxyethylene-polyoxypropylene block polymers, alkylpolyoxyethylene-polyoxypropylene block polymer ether, and fluorine-basedsurfactant.

Examples of the amphoteric surfactant include imidazoline type,amidobetain type, alkylbetaine type, alkylamidobetain type,alkylsulfobetaine type, am idosulfobetaine type, hydroxysulfobetainetype, carbobetaine type, phosphobetaine type, aminocarboxylic acid type,and amide amino acid type amphoteric surfactants. Specific examplesthereof include imidazoline type amphoteric surfactants such as2-undecyl-N, N, N-(hydroxyethylcarboxymethyl)-2-imidazoline sodium and2-cocoyl-2-imitazolinium hydroxide-1-carboxyethyloxy-2-sodium;alkylbetaine type amphoteric surfactants such aslauryldimethylaminoacetic acid betaine and myristyl betaine;amidobetaine type amphoteric surfactants such as coconut oil fatty acidamidopropyldimethylaminoacetic acid betaine, palm kernel oil fatty acidamidopropyldimethylaminoacetic acid betaine, beef tallow fatty acidamidopropyldimethylaminoacetic acid betaine, hydrogenated beef tallowfatty acid amidopropyldimethylaminoacetic acid betaine, lauric acidamidopropyldimethylaminoacetic acid betaine, myristic acidamidopropyldimethylaminoacetic acid betaine, palmitic acidamidopropyldimethylaminoacetic acid, stearic acidamidopropyldimethylaminoacetic acid betaine and oleic acidamidopropyldimethylaminoacetic acid betaine; alkylsulfobetaine typeamphoteric surfactants such as coconut oil fatty aciddimethylsulfopropyl betaine; alkylhydroxysulfobetaine type amphotericsurfactants such as lauryl dimethylaminohydroxysulfobetaine;phosphobetaine type amphoteric surfactants such as laurylhydroxyphosphobetaine; amide amino acid type amphoteric surfactants suchas N-lauroyl-N′-hydroxyethyl-N′-carboxymethylethylenediamine sodium,N-oleoyl-N′-hydroxyethyl-N′-carboxymethylethylenediamine sodium,N-cocoyl-N′-hydroxyethyl-N′-carboxymethylethylenediamine sodium,N-lauroyl-N′-hydroxyethyl-N′-carboxymethylethylenediamine potassium,N-oleoyl-N′-hydroxyethyl-N′-carboxymethylethylenediamine potassium,N-lauroyl-N-hydroxyethyl-N′-carboxymethylethylenediamine sodium,N-oleoyl-N-hydroxyethyl-N′-carboxymethylethylenediamine sodium,N-cocoyl-N-hydroxyethyl-N′-dicarboxymethylethylenediamine sodium,N-lauroyl-N-hydroxyethyl-N′—N′-dicarboxymethylethylenediaminemonosodium, N-oleoyl-N-hydroxyethyl-N′—N′-dicarboxymethylethylenediaminemonosodium, N-cocoyl-N-hydroxyethyl-N′—N′-dicarboxymethylethylenediaminemonosodium,N-lauroyl-N-hydroxyethyl-N′—N′-dicarboxymethylethylenediamine disodium,N-oleoyl-N-hydroxyethyl-N′—N′-dicarboxymethylethylenediamine disodium,and N-cocoyl-N-hydroxyethyl-N′—N′-dicarboxymethylethylenediaminedisodium.

Examples of the semipolar surfactant include alkylamine oxidesurfactants, alkylamine oxides, alkylamidoamine oxides,alkylhydroxyamine oxides, and the like. Of these, alkyldimethylamineoxides having 10 to 18 carbon atoms, alkoxyethyl dihydroxyethylamineoxides having 8 to 18 carbon atoms and the like are preferably used.Specific examples thereof include dodecyl dimethyl amine oxide, dimethyloctyl amine oxide, diethyl decyl amine oxide, bis-(2-hydroxyethyl)dodecyl amine oxide, dipropyl tetradecyl amine oxide, methylethylhexadecyl amine oxide, dodecyl amidopropyl dimethyl amine oxide, cetyldimethyl amine oxide, stearyl dimethyl amine oxide, tallow dimethylamine oxide, dimethyl 2-hydroxyoctadecyl amine oxide, lauryl dimethylamine oxide, myristyl dimethyl amine oxide, stearyl dimethyl amineoxide, isostearyl dimethyl amine oxide, palm fatty acidalkyldimethylamine oxide, caprylic acid amidopropyldimethylamine oxide,capric acid amidopropyldimethylamine oxide, lauric acidamidopropyldimethylamine oxide, myristic acid amidopropyldimethylamineoxide, palmitic acid amidopropyldimethylamine oxide, stearic acidamidopropyldimethylamine oxide, isostearic acid amidopropyldimethylamineoxide, oleic acid amidopropyldimethylamine oxide, ricinoleic acidamidopropyldimethylamine oxide, 12-hydroxystearic acidamidopropyldimethylamine oxide, coconut fatty acidamidopropyldimethylamine oxide, palm kernel oil fatty acidamidopropyldimethylamine oxide, castor oil fatty acid amidopropyldimethyl amine oxide, lauric acid amidoethyldimethylamine oxide,myristic acid amidoethyldimethylamine oxide, coconut fatty acidamidoethyldimethylamine oxide, lauric acid amidoethyldiethylamine oxide,myristic acid amidoethyldiethylamine oxide, coconut fatty acidamidoethyldiethylamine oxide, lauric acid amidoethyldihydroxyethylamineoxide, myristic acid amidoethyl dihydroxy ethylamine oxide, and coconutfatty acid amide ethyl dihydroxyethylamine oxide.

Salts include inorganic salts, organic acid salts, amine salts and aminoacid salts. Examples of the inorganic salt include sodium salts,potassium salt, magnesium salt, calcium salt, aluminum salt, zirconiumsalt, zinc salt and the like of an inorganic acid such as hydrochloricacid, sulfuric acid, carbonic acid and nitric acid; and examples ofsalts of organic acids include acetic acid, dehydroacetic acid, citricacid, malic acid, succinic acid, ascorbic acid and stearic acid; andamine salts and amino acid salts such as salts of amines such astriethanolamine and salts of amino acids such as glutamic acid. Inaddition, salts such as hyaluronic acid and chondroitin sulfate,aluminum zirconium glycine complex and the like, and acid-alkalineutralizing salts used in cosmetic formulations and the like can alsobe used.

Examples of the humectant include polyhydric alcohols such as glycerin,sorbitol, propylene glycol, propylene glycol, dipropylene glycol,1,3-butylene glycol, glucose, xylitol, maltitol and polyethylene glycol;hyaluronic acid, chondroitin sulfate, pyrrolidone carboxylate,polyoxyethylene methyl glucoside, polyoxypropylene methyl glucoside,PEG/PPG dimethyl ether, and the like.

Examples of antiseptics include paraoxybenzoic acid alkyl ester, benzoicacid, sodium benzoate, sorbic acid, potassium sorbate, andphenoxyethanol, and examples of the antibacterial agent include benzoicacid, salicylic acid, carbolic acid, sorbic acid, paraoxybenzoic acidalkyl esters, parachloromethacresol, hexachlorophene, benzalkoniumchloride, chlorhexidine chloride, trichlorocarbanilide, triclosan,photosensitizers, phenoxyethanol and the like, but in the case oflipstick, antiseptics are preferably not blended.

Examples of the antioxidant include tocopherol, butylhydroxyanisole,dibutylhydroxytoluene, phytic acid and the like.

Examples of the pH adjuster include lactic acid, citric acid, glycolicacid, succinic acid, tartaric acid, dl-malic acid, potassium carbonate,sodium bicarbonate, ammonium hydrogen carbonate, and the like.

Examples of the chelating agent include alanine, sodium edetate, sodiumpolyphosphate, sodium metaphosphate, and phosphoric acid.

Examples of a refreshing agent include L-menthol and camphor, andexamples of anti-inflammatory agents include allantoin, glycyrrhetinicacid, glycyrrhizic acid, tranexamic acid, azulene and the like.

Examples of skin-care ingredients include whitening agents such asplacenta extracts, arbutin, glutathione and saxifrage extract, cellactivators such as royal jelly, roughness improving agents, bloodcirculation promotion agents such as nonylic acid warenylamide,nicotinic acid benzyl ester, β-butoxyethyl nicotinate ester, capsaicin,zingerone, cantharis tincture, ichthamol, caffeine, tannic acid,α-borneol, tocopherol nicotinate, inositol hexanicotinate,cycllandelate, cinnarizine, tolazoline, acetylcholine, verapamil,cepharanthin, and γ-oryzanol, astringents such as zinc oxide and tannicacid, anti-seborrhoeic agents such as sulfur and thiantrol, and thelike. Examples of vitamins include vitamin A such as vitamin A oil,retinol, retinol acetate, and retinol palmitate, vitamin B such asvitamin B2 such as riboflavin, riboflavin butyrate and flavin adeninenucleotide, vitamin B6 such as pyridoxine hydrochloride, pyridoxinedioctanoate, and pyridoxine tripalmitate, vitamin B12 and itsderivatives, and vitamin B15 and its derivatives, vitamin C such asL-ascorbic acid, L-ascorbic acid dipalmitate, sodium L-ascorbicacid-2-sulfate, and L-ascorbic acid phosphate dipotassium, vitamin Dsuch as ergocalciferol and cholecalciferol, vitamin E such asα-tocopherol, β-tocopherol, γ-tocopherol, dl-α-tocopherol acetate,dl-α-tocopherol nicotinate, and dl-α-tocopherol succinate, vitamin H,vitamin P, nicotinic acids such as nicotinic acid and benzyl nicotinicacid, and pantothenic acids such as calcium pantothenate, D-pantothenylalcohol, pantothenyl ethyl ether, and acetyl pantothenyl ethyl ether.

Amino acids include amino acids and/or salts thereof such as glycine,valine, leucine, isoleucine, serine, threonine, phenylalanine, arginine,lysine, aspartic acid, glutamic acid, cystine, cysteine, methionine, andtryptophan.

Examples of the nucleic acid include deoxyribonucleic acid and the like,and examples of the hormone include estradiol and ethenylestradiol.

The physiologically active ingredient is a substance which gives somephysiological activity to the skin or hair when it is applied to theskin or hair, and is lipophilic. For example, an anti-inflammatoryagent, an antiaging agent, a tightening agent, a hair growth agent, ahair growth agent, a moisturizer, a blood circulation promoter, adesiccant, a warming sensation agent, vitamins, a wound healingaccelerator, a stimulative reliever, an analgesic, a cell activator, anenzyme component and the like can be mentioned. Similarly, natural plantextract components, seaweed extract components, and/or crude drugingredients can be preferably incorporated.

The pharmaceutical active ingredient is a substance having a diseasetherapeutic effect, and examples thereof include a protein, a peptide,and a low molecular weight compound.

The fragrance is not particularly limited as long as it is a lipophilicperfume, and may be a perfume extracted from flowers, seeds, leaves,roots or the like of various plants, a fragrance extracted fromseaweeds, a fragrance extracted from various parts or secretions ofanimals (e.g., palm civet and Ambergris) and artificially synthesizedfragrances (e.g., menthol, musk, acetate, and vanilla). Perfumes arecompounded to impart fragrance and aroma to the cosmetic. Dyes includeoil-soluble dyes, extender pigments, inorganic pigments, organicpigments, and lipophilic fluorescent brighteners and the like.

In order to produce the cosmetic of the present invention, it can beeasily produced simply by uniformly mixing the cosmetic raw material ofthe present invention and other cosmetic raw materials as describedabove. As the mixing means, various mixing apparatus and kneadingapparatus usually used for manufacturing cosmetics can be used. Examplesof such devices include homomixers, paddle mixers, Henschel mixers,homodisper, colloid mixers, propeller stirrers, homogenizers, inlinecontinuous emulsifiers, ultrasonic emulsifiers, and vacuum typekneaders.

Next, the paint according to one embodiment of the present inventionwill be described in detail.

The paint according to one embodiment of the present invention ischaracterized by containing the above-mentioned silicone particle.Examples of the coating material include a room temperature curing type,a room temperature drying type, and a heat curing type coating material,and examples thereof include aqueous, oily and powdery forms dependingon their properties. Furthermore, polyurethane resin paint, butyralresin paint, long oil phthalic acid resin paint, alkyd resin paint,amino alkyd resin paint comprising amino resin and alkyd resin, epoxyresin paint, acrylic resin paint, phenolic resin paint, siliconemodified epoxy resin paint, silicone modified polyester resin paint,silicone resin paints are exemplified depending on the resin of thevehicle.

In this paint, it is preferable that the above-mentioned siliconeparticles have affinity or reactivity with the resin in the paint. Forexample, in paints using epoxy resin as a vehicle, they are preferablysilicone particles having epoxy group or amino group. In a coatingmaterial using a polyurethane resin or an amino resin as a vehicle,silicone particles having an amino group are preferable.

In this paint, the content of the above-mentioned silicone particles isnot limited, but in order to impart uniform and soft matting property tothe obtained coating film, it is preferably in the range of 0.1 to 150parts by mass, more preferably in the range of 0.1 to 100 parts by mass,and particularly preferably in the range of 0.1 to 50 parts by mass,based on 100 parts by mass of the resin solid content.

In addition to the above-mentioned silicone particles, the paint maycontain an alcohol such as methanol or ethanol, a ketone such as methylethyl ketone or methyl isobutyl ketone, an ester such as ethyl acetate,butyl acetate or cellosolve acetate, an amide such asN,N-dimethylformamide, an olefin such as hexane, heptane or octane; anorganic solvent such as an aromatic hydrocarbon such as toluene orxylene; a thickener comprising a pigment or a polymer compound; a flameretardant; or a weathering resistance imparting agent.

By heating an aqueous dispersion of the crosslinkable composition forforming silicone particles or an aqueous dispersion of the crosslinkablecomposition for forming silicone particles prepared by adding thecomponent (C) to the aqueous dispersion of the silicone compositionexcept for the component (C) to room temperature, or 100° C. or less,preferably 70° C. or less, it is possible to promote the crosslinking ofthe crosslinkable composition for forming silicone particles dispersedin water.

Next, silicone particles can be recovered by removing water from theaqueous dispersion of silicone particles obtained by curing thecrosslinkable composition for forming silicone particles dispersed inwater. As a method for recovering silicone particles, a method byheating or depressurizing the aqueous dispersion of silicone particlesor by hot air drying, air drying or the like is exemplified. Inaddition, it is possible to easily remove moisture by filtering thiswater dispersion before drying or subjecting this water dispersion toseparation by centrifugation or salting out.

Since such a resin additive of the present invention can impartflexibility and thermal shock resistance to the resin, it is suitable asadditives for thermosetting resins such as epoxy resin and phenol resin,or an additive for thermoplastic resins such as polyethylene resin,polypropylene resin, nylon resin, polyester resin and the like.

Next, the electronic material which is one embodiment of the presentinvention will be described in detail.

An electronic material according to one embodiment of the presentinvention contains the crosslinkable composition for forming siliconeparticles as described above. In the electronic material of oneembodiment of the present invention, the content of the crosslinkablecomposition for forming silicone particles is not limited, but it ispreferably in the range of 0.1 to 100 parts by weight based on 100 partsby weight of the curable resin. This is because if the content of theresin additive is less than the lower limit of the above range,flexibility and thermal shock resistance of the obtained cured resin arelowered, and in particular, thermal shock resistance after moistureabsorption tends to decrease. On the other hand, if it exceeds the upperlimit of the above range, the mechanical properties of the obtainedcured resin tend to deteriorate.

In the electronic material which is one embodiment of the presentinvention, as a curable resin which is a main component thereof, phenolresin, formaldehyde resin, xylene resin, xylene-formaldehyde resin,ketone-formaldehyde resin, furan resin, urea resin, imide resin,melamine resin, alkyd resins, unsaturated polyester resins, anilineresins, sulfone-amide resins, silicone resins, epoxy resins, andcopolymer resins of these resins can be mentioned, and two or more ofthese curable resins can also be used in combination. In particular, thecured resin is preferably at least one selected from the groupconsisting of epoxy resin, phenol resin, imide resin, and siliconeresin. The epoxy resin may be a compound containing a glycidyl group oran alicyclic epoxy group, and examples thereof include an o-cresolnovolak type epoxy resin, a biphenyl type epoxy resin, a bisphenol Atype epoxy resin, a bisphenol F type epoxy resin, a dicyclo pentadienetype epoxy resin, a naphthalene type epoxy resin, an anthracene typeepoxy resin, a naphthol aralkyl type epoxy resin, a polyvinyl phenoltype epoxy resin, a diphenyl methane type epoxy resin, a diphenylsulfone type epoxy resin, a triphenol alkane type epoxy resin, a cresoland naphthol condensation type epoxy resin, a bisphenylethylene typeepoxy resin, a fluorene type epoxy resin, a stilbene type epoxy resin, aspirocumaron type epoxy resin, a norbornene type epoxy resin, terpenetype epoxy resins, phenol cyclohexane type epoxy resins, halogenatedepoxy resins, imide group-containing epoxy resins, maleimidegroup-containing epoxy resins, allyl group-modified epoxy resins, andsilicone-modified epoxy resins. Also, as this phenolic resin, phenolresins such as polyvinyl phenol type, phenol novolac type, naphtholtype, terpene type, phenol dicyclopentadiene type, phenol aralkyl type,naphthol aralkyl type, triphenol alkane type, dicyclopentadiene type,cresol/naphthol condensation type, and xylene/naphthol co-condensationtype can be exemplified. As the silicone resin, an epoxy-modifiedsilicone resin obtained by reacting an epoxy resin with a silanol groupin a silicone resin or a silicon atom-bonded alkoxy group isexemplified. As a curing mechanism of such curable resin, high energyray curable type such as thermosetting type, ultraviolet ray orradiation, moisture curing type, condensation reaction curing type andaddition reaction curing type are exemplified. Further, the propertiesof such a curable resin at 25° C. are not limited, and may be either aliquid state or a solid state in which the curable resin is softened byheating.

In addition, as an optional component of the electronic material of oneembodiment of the present invention, a curing agent, a curingaccelerator, a filler, a photosensitizer, a higher fatty acid metalsalt, an ester wax, a plasticizer and the like can be blended. Examplesof the curing agent include organic acids such as carboxylic acid andsulfonic acid and anhydrides thereof; organic hydroxy compounds;organosilicon compounds having a silanol group, alkoxy group, orhalogeno group; and primary or secondary amino compounds. Two or more ofthese can be combined. Examples of the curing accelerator includetertiary amine compounds, organometallic compounds such as aluminum andzirconium, organic phosphorus compounds such as phosphine, heterocyclicamine compounds, boron complex compounds, organic ammonium salts,organic sulfonium salts, organic peroxides, and hydrosilylationcatalysts. Further, as this filler, fibrous fillers such as glass fiber,asbestos, alumina fiber, ceramic fiber containing alumina and silica asa component, boron fiber, zirconia fiber, silicon carbide fiber, metalfiber, polyester fiber, aramid fiber, nylon fiber, phenol fiber, andnatural animal and plant fibers; and granular fillers such as fusedsilica, precipitated silica, fumed silica, calcined silica, zinc oxide,calcined clay, carbon black, glass beads, alumina, talc, calciumcarbonate, clay, aluminum hydroxide, barium sulfate, titanium dioxide,aluminum nitride, silicon carbide, magnesium oxide, beryllium oxide,kaolin, mica, zirconia and the like can be exemplified, and two or moreof these can be combined.

Furthermore, since silicone particles of the present invention areexcellent in stress relaxation effect when compounded in a resin, theymay be incorporated in epoxy resin or the like for a printed wiringboard to form a prepreg. Furthermore, they can be formed into a copperfoil with filler particle-containing resin layer for a printed wiringboard having a resin layer containing silicone particles of the presentinvention on one surface of copper foil and used for copper cladlaminate (CCL) applications.

EXAMPLES

Silicone particles of the present invention and the method for producingthem will be explained in detail by Examples and Comparative Examples.However, the present invention is not limited to only these examples.The viscosity in the examples is a value at 25° C. The properties ofsilicone particles were measured as follows.

[JIS A Hardness of the Cured Silicone Particles]

The curable silicone composition, which is a raw material of the curedsilicone particles, was heated in a heating oven at 150° C. for 1 hourto be cured into a sheet form. This hardness was measured with a JIS Ahardness meter specified in JIS K 6253.

[SiH Residual Amount of the Cured Silicone Particles]

An equivalent solution of potassium hydroxide in ethanol at aconcentration of 40% to the unit mass of the cured silicone particleswas added, the mixture was left standing for 1 hour, the generatedhydrogen gas until the reaction was completed was collected, thegeneration amount of hydrogen was measured by a headspace gaschromatography, and the residual amount (ppm) of the hydrogen connectedto the silicon atom per unit mass was measured.

[Average Particle Diameter of Primary Particles]

The emulsion before adding the platinum catalyst was measured by a laserdiffraction type particle size distribution analyzer (LS-230 by BeckmanCoulter), and its median diameter (particle diameter corresponding to50% of cumulative distribution, 50% particle diameter) was taken as theaverage particle diameter.

[Powder Particle Size]

Using ethanol as a dispersion medium, the particle diameter of the curedsilicone particle was measured with a laser diffraction type particlesize distribution measuring instrument (LA-500, manufactured by Horiba,Ltd.) and values of median diameter (particle size corresponding to 50%of the cumulative distribution, D90, μm) and arithmetic dispersion(showing a degree of dispersion of particle size distribution, SD, μm2)of the cured silicone particles in the ethanol were obtained. In themeasurement sample, the cured silicone particles (1 g) and the ethanol(100 mL) were dispersed in a 300 mL cup using a stirring blade and anultrasonic oscillator.

[Measurement Method of Mixture Viscosity]

Cured silicone particles (6 g) and decamethylcyclopentasiloxane (58 g)were weighed in a 300 mL cup and stirred for 2 minutes at 4000 rpm witha disper. Thereafter, using a BM type rotary viscometer (manufactured byToki Sangyo Co., Ltd.) under a condition of 60 rpm with a rotor No. 2, avalue after 1 minute was defined as viscosity.

[Measurement Method of Powder Oil Absorption Amount]

In a 100 ml beaker, 5 g of the cured silicone particles were placed, andwhile the cured silicone particles were gently stirred with a glass rod,squalane, cetyl ethylhexanoate (Note 1), mineral oil (Note 2), ordecamethylcyclopentasiloxane (Note 3) was dropped drop by drop, and adropping amount of oil required until the cured silicone particles andthe oil became a uniform pasty substance was determined. The ratio ofthe dropping amount of the oil to the cured silicone particles was setas the oil absorption amount (weight %) of the organic crosslinkedparticles.

Note 1: CEH manufactured by KOKYU ALCOHOL KOGYO. CO., LTD.

Note 2: HICALL K-230 manufactured by KANEDA Co., Ltd.

Note 3: SH245 manufactured by Dow Corning Toray Co., Ltd.

The average formulae of the components (A) and (B) used in the Examplesand Comparative Examples are listed below.

In the following formulae, Vi represents CH₂═CH—, Me represents CH₃—,and He represents CH₂═CH—C₄H₈—.

Me₂HeSiO-(Me₂SiO)₁₃₅-(MeHeSiO)_(0.25)—SiHeMe₂,  [Chemical formula 1]

The alkenyl group content is 0.97 wt %. The viscosity is 420 mPa·s.

ViMe₂SiO-(Me₂SiO)₁₅₀-Me₂Si-Vi,  [Chemical Formula 2-2]

The alkenyl group content is 0.47 wt %. The viscosity is 360 mPa·s.

ViMe₂SiO-(Me₂SiO)₁₃₀-(ViMeSiO)₂-Me₂Si-Vi  [Chemical Formula 3-3]

The alkenyl group content is 1.08 wt %. The viscosity is 370 mPa·s.

1,5-hexadiene (molecular weight=82.15) manufactured by Tokyo ChemicalIndustry Co., Ltd.  [Chemical Formula 4-4]

Me₃SiO-(Me₂SiO)_(33.7)—(HMeSiO)_(11.5)—SiMe₃,  [Chemical Formula 2-1]

The content of the hydrogen bonded to the silicon atom is 0.44 wt %. Theviscosity is 50 mPa·s.

(Me₃SiO_(1/2))₂(Me₂SiO_(2/2))₇(HMeSiO_(2/2))₁₁(MeSiO_(3/2))₁,  [ChemicalFormula 2-2]

The silicon atom-bonded hydrogen atom content is 0.825 wt %. Theviscosity is 15 mPa·s.

HMe₂SiO-(Me₂SiO)₆₀-Me₂SiH.  [Chemical Formula 2-3]

The silicon atom-bonded hydrogen atom content is 0.043 wt %. Theviscosity is 64 mPa·s.

Example 1

The polyorganosiloxane represented by the average formula of [ChemicalFormula 1-1] and the polyorganosiloxane represented by the averageformula of [Chemical Formula 2-1] were uniformly mixed at roomtemperature in the blending amounts listed in Table 1. Next, thiscomposition was dispersed in an aqueous solution of 25° C. composed of0.4 parts by mass of polyoxyethylene alkyl (C12-14) ether and 50 partsby mass of pure water, further uniformly emulsified by a colloid mill,and thereafter, 350 parts by mass was added and diluted to prepare anemulsion. Next, an isopropyl alcohol solution of chloroplatinic acid (inan amount with which the platinum metal in the present compositionbecomes 10 ppm) was added to the emulsion as a pure water dispersion ofpolyoxyethylene alkyl (C12-14) ether and stirred, and thereafter thisemulsion was allowed to stand at 50° C. for 3 hours to prepare a uniformaqueous suspension of the silicone rubber particles. Next, thiswater-based suspension was dried with a small spray dryer (manufacturedby Ashizawa-Niro) to obtain silicone particles. The properties are shownin Table 1.

Examples 2-4 and Comparative Examples 1 and 2

The raw materials listed in Table 1 were uniformly mixed at roomtemperature with the blending composition shown in Table 1 to prepare acrosslinkable composition for forming silicone particles. Next, thiscomposition was treated in the same manner as in Example 1 to obtainsilicone particles. The properties are shown in Table 1.

TABLE 1 Exam- Exam- Exam- ple 1 ple 2 ple 3 Charge [Chemical formula 1]92.5 95.8 48.4 amount [Chemical formula 1-2] 48.4 (Parts by [ChemicalFormula 1-3] mass) [Chemical Formula 1-4] [Chemical Formula 2-1] 7.5[Chemical Formula 2-2] 4.2 3.2 [Chemical Formula 2-3] JIS-A hardness 4139 31 SiH residual amount (ppm) 1.9 15.8 10.2 The average particlediameter of primary 6.8 7.3 6.9 particles (μm) Powder Median diameter(μm) 24 25 9 particle Degree of dispersion 226 250 20 size (SD, μm²)Decamethylcyclopentasiloxane mixture 38 21 29 solution viscosity (mPa ·s) Powder oil Squalane 39 40 44 absorption Cetyl ethylhexanoate 48 56 59amount Decamethylcyclopenta- 203 207 231 (weight %) siloxane Com- Com-para- para- Exam- tive Ex- tive Ex- ple 4 ample 1 ample 2 Charge[Chemical formula 1] 54.5 amount [Chemical formula 1-2] 59.6 (Parts by[Chemical Formula 1-3] 91.7 mass) [Chemical Formula 1-4] 5.4 [ChemicalFormula 2-1] 35.0 8.3 [Chemical Formula 2-2] [Chemical Formula 2-3] 45.5JIS-A hardness 24 41 47 SiH residual amount (ppm) 1.0 373.3 25.8 Theaverage particle diameter of primary 7.0 6.8 7.5 particles (μm) PowderMedian diameter (μm) 40 51 13 particle Degree of dispersion 527 571 62size (SD, μm²) Decamethylcyclopentasiloxane mixture 43 25 28 solutionviscosity (mPa · s) Powder oil Squalane 42 47 36 absorption Cetylethylhexanoate 62 57 39 amount Decamethylcyclopenta- 326 167 169 (weight%) siloxane

Hereinafter, formulation examples of the cosmetic material of thepresent invention, to which the silicone particles as one form of thepresent invention can be blended, will be shown. However, the presentinvention is not limited to these examples.

Formulation Example 1: W/O Cream Foundation (Component) Phase A

Cetyl diglyceryl tris (trimethylsiloxy) silyl ethyl dimethicone(Note 1) 5.0 parts by mass2) Dimethicone (Note 2) 4.2 parts by mass3) Ethylhexyl methoxycinnamate (Note 3) 3.3 parts by mass4) Caprylyl methicone (Note 4) 3.3 parts by mass5) Isododecane, (Dimethicone/Bis-isobutyl PPG-20) Crosspolymer (Note 5)1.5 parts by mass6) Silicone crosslinked product of Examples 2.0 parts by mass

Phase B

7) Titanium oxide, talc, methicone (Note 6) 4.71 parts by mass8) Mica, aluminum hydroxide (Note 7) 2.46 parts by mass9) Iron oxide yellow (Note 8) 0.66 parts by mass10) Iron oxide red (Note 9) 0.16 parts by mass11) Iron oxide black (Note 10) 0.006 parts by mass12) Cetyl diglyceryl tris (trimethylsiloxy) silyl ethyl dimethicone(Note 11) 0.5 parts by mass13) Caprylylmethicone (Note 12) 3.7 parts by mass

Phase C

14) Purified water 61.5 parts by mass15) BG 8.0 parts by mass16) Sodium chloride 1.0 part by massNote 1: ES-5600 Silicone Glycerol Emulsifier manufactured by Dow CorningToray Co., Ltd.Note 2: PMX-200 SILICONE FLUID 2 CS manufactured by Dow Corning TorayCo., Ltd.Note 3: Neo Heliopan AV made by SymriseNote 4: FZ-3196 manufactured by Dow Corning Toray Co., Ltd.Note 5: EL-8050 ID Silicone Organic Elastomer Blend manufactured by DowCorning Toray Co., Ltd.Note 6: SA Titan CR-50 manufactured by Miyoshi Kasei Industry Co., Ltd.Note 7: SA Exel Mica JP-2 manufactured by Miyoshi Kasei Industry Co.,Ltd.Note 8: SA Yellow UXLO manufactured by Miyoshi Kasei Industry Co., Ltd.Note 9: SA Red manufactured by Miyoshi Kasei Industry Co., Ltd.Note 10: SA Black manufactured by Miyoshi Kasei Industry Co., Ltd.Note 11: ES-5600 Silicone Glycerol Emulsifier manufactured by DowCorning Toray Co., Ltd.Note 12: FZ-3196 manufactured by Dow Corning Toray Co., Ltd.

The W/O cream foundation of Formulation Example 1 is adjusted by thefollowing procedure.

1. Mix components 1-6 until uniform.2. Mix 3 rolls of components 7-13.3. Mix components 14 to 16.4. Mix 1 and 2 above.5. Add 3 above while vigorously stirring 4 above and emulsify.

Formulation Example 2: 0/W Foundation (Component) Phase A

1) Silicone crosslinked product of Examples 18 parts by mass2) Talc (Note 1) 18 parts by mass

Phase B

3) Purified water 20 parts by mass4) Glycerin 10 parts by mass

Phase C

5) Sodium polyacrylate, dimethicone (Note 2) 1 part by mass6) DMDM hydantoin, butyl carbamate propynyl iodide (Note 3) appropriateamount7) Ethylhexyl salicylate (Note 4) 3 parts by mass8) Ethylhexyl methoxycinnamate (Note 5) 3 parts by mass

Phase D

9) Purified water 21 parts by mass

Phase E

10) Caprylyl methicone (Note 6) 2 parts by mass11) Iron oxide black, dimethicone (Note 7) 0.05 parts by mass12) Iron oxide red, dimethicone (Note 8) 0.1 part by mass13) Iron oxide yellow, dimethicone (Note 9) 0.25 parts by mass14) Titanium oxide, talc, dimethicone (Note 10) 3.6 parts by massNote 1: Si talc manufactured by Miyoshi Kasei Industry Co., Ltd.Note 2: RM 2051 Rheology Modifier manufactured by Dow Corning Toray Co.,Ltd.Note 3: Glydant Plus manufactured by LonzaNote 4: Neo Heliopan OS manufactured by SymriseNote 5: Escalol 557 manufactured by ISPNote 6: FZ-3196 manufactured by Dow Corning Toray Co., Ltd.Note 7: SA-Black BL-100 manufactured by Miyoshi Kasei Industry Co., Ltd.Note 8: SA-Bengara Cloisonne manufactured by Miyoshi Kasei Industry Co.,Ltd.Note 9: SI-YELLOW-LLXLO manufactured by Miyoshi Kasei Industry Co., Ltd.Note 10: SI-titanium CR-50 manufactured by Miyoshi Kasei Industry Co.,Ltd.

The O/W cream foundation of Formulation Example 2 is adjusted by thefollowing procedure.

1. Mix components 1 and 2.2. Mix components 3 and 4.3. Mix 1 and 2 above.4. Mix components 5-8.5. Add the component 9 to above 4 and mix.6. Mix components 10 to 14 until uniform.7. Mix all components.

Formulation Example 3: W/O BB Cream (Component) Phase A

1) Lauryl PEG-10 tris(trimethylsiloxy) silyl ethyl dimethicone (Note 1)3 parts by mass2) Caprylyl methicone (Note 2) 14 parts by mass3) Ethylhexyl methoxycinnamate (Note 3) 7.5 parts by mass4) Hexyl diethylamino hydroxybenzoylbenzoate (Note 4) 1.5 parts by mass5) Ethylhexyl salicylate 2.5 parts by mass6) Trimethylsiloxysilicate, polypropylsilsesquioxane (Note 5) 2 parts bymass7) Silicone crosslinked product of Examples 4 parts by mass8) Phenyl trimethicone (Note 6) 4 parts by mass

Phase B

9) Glycerin 8 parts by mass10) Sodium chloride 0.7 parts by mass11) Purified water 40.8 parts by mass

Phase C

12) Titanium oxide 5.6 parts by mass13) Iron oxide yellow (Note 7) 0.25 parts by mass14) Iron oxide red (Note 8) 0.1 parts by mass15) Iron oxide black (Note 9) 0.05 parts by mass16) Phenyl trimethicone (Note 10) 5.2 parts by mass17) Zinc oxide (Note 11) 0.8 parts by mass18) Lauryl PEG-10 tris (trimethylsiloxy) silyl ethyl dimethicone 1 partby massNote 1: ES-5300 Formulation Aid manufactured by Dow Corning Toray Co.,Ltd.Note 2: FZ-3196 manufactured by Dow Corning Toray Co., Ltd.Note 3: Uvinar MC80N manufactured by BASFNote 4: Uvinar A Plus Glanular manufactured by BASFNote 5: MQ-1640 Flake Resin manufactured by Dow Corning Toray Co., Ltd.Note 6: SH 556 manufactured by Dow Corning Toray Co., Ltd.Note 7: SA-IOY-8 manufactured by Sanji Kasei Industry Co., Ltd.Note 8: SA-IOR-8 manufactured by Sanji Kasei Industry Co., Ltd.Note 9: SA-IOB-8 manufactured by Sanji Kasei Industry Co., Ltd.Note 10: SH 556 manufactured by Dow Corning Toray Co., Ltd.Note 11: FINEX-30S-LPT manufactured by SAKAI CHEMICAL INDUSTRY CO., LTD.Note 12: ES-5300 Formulation Aid manufactured by Dow Corning Toray Co.,Ltd.

The W/O BB cream of Formulation Example 3 is adjusted by the followingprocedure.

1. Mix components 1-8. (Dissolve the UV absorber first and dissolveMQ-1640 in FZ-3196)2. Mix components 9 to 11.3. Mix components 12 to 18.4. Mix 1 and 3 above.5. While vigorously stirring 1 above, slowly add 2 above and emulsify.

Formulation Example 4: Nonaqueous Foundation (Component) Phase A

1) Titanium oxide, dimethicone (Note 1) 49.23 parts by mass2) Iron oxide yellow, dimethicone (Note 2) 9.86 parts by mass3) Iron oxide red, dimethicone (Note 3) 1.97 parts by mass4) Iron oxide black, dimethicone (Note 4) 0.55 parts by mass5) Cetyl diglyceryl tris (trimethylsiloxy) silyl ethyl dimethicone (Note5) 1.58 parts by mass6) Caprylylmethicone (Note 6) 15.8 parts by mass

Phase B

7) Silicone crosslinked product of Examples 2 parts by mass8) Cyclopentasiloxane (Note 7) 13 parts by mass9) Isododecane, (Acrylates/polytrimethylsiloxy methacrylate) copolymer(Note 8) 5 parts by mass10) disteardimonium hectorite (Note 9) 1 part by massNote 1: SI-titanium CR-50 manufactured by Miyoshi Kasei Industry Co.,Ltd.Note 2: SI-YELLOW-LLXLO manufactured by Miyoshi Kasei Industry Co., Ltd.Note 3: SA-Bengara Cloisonne manufactured by Miyoshi Kasei Industry Co.,Ltd.Note 4: SA-Black BL-100 manufactured by Miyoshi Kasei Industry Co., Ltd.Note 5: ES-5600 Silicone Glycerol Emulsifier manufactured by Dow CorningToray Co., Ltd.Note 6: FZ-3196 manufactured by Dow Corning Toray Co., Ltd.Note 7: SH 245 manufactured by Dow Corning Toray Co., Ltd.Note 8: FA 4002 ID Silicone Acrylate manufactured by Dow Corning TorayCo., Ltd.Note 9: Bentone® 38 V CG manufactured by Elementis plc

The nonaqueous foundation of Formulation Example 4 is adjusted by thefollowing procedure.

1. Mix components 1-6.2. Mix components 7 to 10.3. Mix 1 and 2 above.

Formulation Example 5: Compact Foundation (Component)

1) Talc (Note 1) 20 parts by mass2) Mica (Note 2) 34.6 parts by mass3) Titanium oxide (Note 3) 10 parts by mass4) Iron oxide red (Note 4) 1 part by mass5) Iron oxide yellow (Note 5) 4 parts by mass6) Iron oxide black (Note 6) 0.4 parts by mass7) Mica (Note 7) 15 parts by mass8) Polystyrene (Note 8) 5 parts by mass9) Squalane 3 parts by mass10) Octyldodecyl myristate (note 9) 1.2 parts by mass11) Vaseline 2.5 parts by mass12) Dimethicone (Note 10) 3.3 parts by mass13) Silicone crosslinked product of examples 5 parts by massNote 1: SI Talc manufactured by Miyoshi Kasei Industry Co., Ltd.Note 2: SI-SERICITE FSE manufactured by Miyoshi Kasei Industry Co., Ltd.Note 3: SI-Titan CR-50 manufactured by Miyoshi Kasei Industry Co., Ltd.Note 4: SA Red manufactured by Miyoshi Kasei Industry Co., Ltd.Note 5: SA Yellow UXLO manufactured by Miyoshi Kasei Industry Co., Ltd.Note 6: SA Black manufactured by Miyoshi Kasei Industry Co., Ltd.Note 7: SA-Excel Mica JP-2 manufactured by Miyoshi Kasei Industry Co.,Ltd.Note 8: Fine pearl 3000 SPQ manufactured by Sumitomo Chemical Co., Ltd.Note 9: EXCEPARL OD-M manufactured by Kao CorporationNote 10: SH200-5000cs manufactured by Dow Corning Toray Co., Ltd.

The compact foundation of Formulation Example 5 is adjusted by thefollowing procedure.

1. Mix all of the above.

Formulation Example 6: W/O Skin Cream (Component) Phase A

1) Lauryl PEG/PPG-18/18 dimethicone (Note 1) 2 parts by weight2) Bis (hydroxyethoxypropyl) dimethicone (Note 2) 2 parts by mass3) Isopropyl palmitate (Note 3) 1 part by mass4) Cyclopentasiloxane (Note 4) 6.5 parts by mass5) Mineral oil (Note 5) 10 parts by mass6) Vaseline 1.5 parts by mass7) Silicone crosslinked product of Examples 5 parts by mass

Phase B

8) Glycerin 5 parts by mass9) Sodium chloride 1 part by mass10) Purified water 66 parts by massNote 1: 5200 Formulation Aid manufactured by Dow Corning Toray Co., Ltd.Note 2: 5562 Carbinol Fluid manufactured by Dow Corning Toray Co., Ltd.Note 3: EXEPARL IPM manufactured by Kao CorporationNote 4: SH 245 manufactured by Dow Corning Toray Co., Ltd.Note 5: HICALL K-230 manufactured by KANEDA Co., Ltd.

The W/O skin cream of Formulation Example 6 is adjusted by the followingprocedure.

1. Mix components 1-7.2. Mix components 8-10.3. While vigorously stirring 1 above, slowly add 2 above and emulsify.

Formulation Example 7: Sunscreen Nonaqueous Lotion (Component)

1) Zinc oxide (Note 1) 6 parts by mass2) Lauryl PEG-10 tris(trimethylsiloxy) silyl ethyl dimethicone (Note 2)0.5 parts by mass3) Hexadecane 3.5 parts by mass4) Ethylhexyl methoxycinnamate (Note 3) 7.5 parts by mass5) Dimethicone, dimethicone crosspolymer (Note 4) 24 parts by mass6) Cyclopentasiloxane (Note 5) 60.5 parts by mass7) Silicone crosslinked product of Examples 2 parts by massNote 1: FINEX-30S-LPT manufactured by Sakai Chemical Co., Ltd.Note 2: ES-5300 Formulation Aid manufactured by Dow Corning Toray Co.,Ltd.Note 3: Uvinar MC80N manufactured by BASFNote 4: 9041 Silicone Elastomer Blend manufactured by Dow Corning TorayCo., Ltd.Note 5: SH 245 manufactured by Dow Corning Toray Co., Ltd.

The sunscreen nonaqueous lotion of Formulation Example 7 is adjusted bythe following procedure.

1. Mix components 1 to 3 (with a bead mill etc.).2. Add components 4 to 7 to the above ingredients and stir the mixtureuntil uniform.

Formulation Example 8: O/W Wrinkle Care Cream (Component) Phase A

1) Cyclopentasiloxane (Note 1) 11 parts by mass2) Silicone crosslinked product 10 parts by mass3) Lauryl PEG/PPG-18/18 dimethicone (Note 2) 0.5 parts by weight4) PEG-12 dimethicone (Note 3) 4 parts by mass

Phase B

5) Purified water 72.5 parts by mass

Phase C

6) Polyacrylamide, water, (C13, 14) isoparaffin, Laureth-7 (Note 4) 2parts by massNote 1: SH 245 manufactured by Dow Corning Toray Co., Ltd.Note 2: 5200 Formulation Aid manufactured by Dow Corning Toray Co., Ltd.Note 3: OFX-5329 manufactured by Dow Corning Toray Co., Ltd.

Note 4: Simulgel 305 manufactured by SEPPIC S.A.

The O/W wrinkle care cream of Formulation Example 8 is adjusted by thefollowing procedure.

1. Mix components 1-4 until uniform.2. Mix components 4 and 5 until uniform.3. Add 1 to 2 above and mix until uniform.

INDUSTRIAL APPLICABILITY

Since silicone particles of the present invention are excellent indispersibility in ethanol and silicone oil, they are easy to be blendedas additives, and when they are blended in cosmetic materials as acosmetic raw material, their feel can be improved, so that the siliconeparticle of the present invention can be used for skin cosmeticmaterials, make-up cosmetic materials, and the like. In addition, bytaking advantage of its physical properties, as the application to theelectronic materials, the silicone particles of the present inventioncan also be used for additives such as thermosetting resin compositionand thermoplastic resin composition, or for surface lubricant of aplastic film.

1. Silicone particles having a siloxane as a component, wherein: acontent of hydrogen bonded to a silicon atom per unit mass is 300 ppm orless; and the silicon atom in the siloxane that is a component for thesilicone particles is crosslinked with another silicon atom via analkylene group having a carbon number of 4 to
 20. 2. The siliconeparticles according to claim 1, wherein the alkylene group bonded to thesilicon atom has 4 or more and 12 or less carbon atoms.
 3. Siliconeparticles, obtained by reacting a composition comprising components (A)and (B) below: (A) an organopolysiloxane having two or more alkenylgroups having 4 or more and 20 or less carbon atoms in one molecule; and(B) a silicon organic compound having two or more hydrogen atoms bondedto the silicon atom in one molecule, with the hydrogen atoms being notmore than 40% based on the number of silicon atoms in one molecule,and/or a silicon organic compound having two or more hydrogen atomsbonded to the silicon atom in one molecule and having a trifunctionalsiloxane unit or a tetrafunctional siloxane unit; wherein a molar ratioof a content of the alkenyl group (Alk) in component (A) to a content ofthe hydrogen atom (H) bonded to the silicon atom in component (B) is:H/Alk=0.7 to 1.2.
 4. The silicone particles according to claim 3,wherein the alkenyl group in component (A) has 4 or more and 12 or lesscarbon atoms.
 5. The silicone particles according to claim 3, whereinthe content of the hydrogen bonded to the silicon atom per unit mass is300 ppm or less.
 6. The silicone particles according to claim 1, whereina powder particle diameter is 1 to 50 μm as measured by a laserdiffraction scattering method.
 7. The silicone particles according toclaim 1, wherein JIS-A hardness is 70 or less as measured by curing in asheet form a pre-cured crosslinkable composition for forming thesilicone particles.
 8. The silicone particles according to claim 7,wherein a relationship between the JIS-A hardness (Vα) measured bycuring in a sheet form the pre-cured crosslinkable composition forforming the silicone particles and a powder particle diameter measuredby a laser diffraction scattering method (Vβ) satisfies:Vα×Vβ≤1,200.
 9. The silicone particles according to claim 1, which are acosmetic raw material.
 10. A cosmetic product comprising the siliconeparticles according to claim
 9. 11. The silicone particles according toclaim 1, which are a resin compounding agent.
 12. A paint containing thesilicone particles according to claim
 11. 13. A crosslinkablecomposition for forming silicone particles, comprising components (A)and (B) below: (A) an organopolysiloxane having two or more alkenylgroups having 4 or more and 20 or less carbon atoms in one molecule; and(B) a silicon organic compound having two or more hydrogen atoms bondedto the silicon atom in one molecule, with the hydrogen atoms being notmore than 40% based on the number of silicon atoms in one molecule,and/or a silicon organic compound having two or more hydrogen atomsbonded to the silicon atom in one molecule and having a trifunctionalsiloxane unit or a tetrafunctional siloxane unit; wherein a molar ratioof a content of the alkenyl group (Alk) in component (A) to a content ofthe hydrogen atom (H) bonded to the silicon atom in component (B) is:H/Alk=0.7 to 1.2.
 14. A method for producing silicone particles, themethod comprising: emulsifying the composition according to claim 13;and curing the composition in presence of a catalyst.